Ported vacuum it shall be
Thanks for the clear description. I can do it since the guy at Jet told me exactly where to drill and what sizes to use, but I'll probably just take it back to him. I'd hate to muck it up. Or... I could maybe trade the TB off my Caddy 500's Qjet. That car is laid up for several months in preparation for an ecid dip, and its probably getting EFI with its own spark control, so it won't need vacuum advance at all. The idea juices are flowing now